📄 connect.htm
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<html><head><meta http-equiv="Content-Language" content="en-us"><meta http-equiv="Content-Type" content="text/html; charset=windows-1252"><title>UDT Reference</title></head><body><table border="1" cellpadding="0" cellspacing="0" style="border-collapse: collapse" width="100%" id="AutoNumber1" bgcolor="#99CCFF" bordercolor="#99CCFF"> <tr> <td width="100%"><font face="Verdana" size="2"><i> UDT Reference: UDT Functions</i></font></td> </tr></table><h1><font size="4" face="Verdana">connect</font></h1><p><font face="Verdana" size="2">The <b>connect</b> method connects to a server UDT entity and constructs a UDT connection.</font></p><table border="1" cellpadding="0" cellspacing="0" style="border-collapse: collapse" width="100%" id="AutoNumber2" bgcolor="#C0C0C0" bordercolor="#C0C0C0"> <tr> <td width="100%"> <p style="margin-top: 0; margin-bottom: 0"> <font face="Courier New" size="1">int connect(<br> UDTSOCKET <font color="#FFFFFF"> <a class="synParam" onclick="showTip(this)">u</a></font>,</font><p style="margin-top: 0; margin-bottom: 0"> <font face="Courier New" size="1"> const struct sockaddr *<font color="#FFFFFF"><a class="synParam" onclick="showTip(this)">name</a></font>,</font><p style="margin-top: 0; margin-bottom: 0"> <font face="Courier New" size="1"> int <font color="#FFFFFF"> <a class="synParam" onclick="showTip(this)">namelen</a></font><br> );</font></td> </tr></table><h4><font face="Verdana" size="2">Parameters</font></h4><dl> <dt><font face="Verdana"><i><font size="2">u</font></i></font></dt> <dd><font face="Verdana" size="2">[in] Descriptor identifying an unconnected socket. </font></dd> <dt><font face="Verdana"><i><font size="2">name</font></i></font></dt> <dd><font face="Verdana" size="2">[in] Name of the socket to which the connection should be established. </font></dd> <dt><font face="Verdana"><i><font size="2">namelen</font></i></font></dt> <dd><font face="Verdana" size="2">[in] Length of the name. </font></dd></dl><h4><font face="Verdana" size="2">Return Values</font></h4><p><font face="Verdana" size="2">On success, 0 is returned. Otherwise, UDT::ERROR is returned and the specific error information can be retrieved using<a href="error.htm">getlasterror</a>.</font></p> <table border="1" cellpadding="0" cellspacing="0" style="border-collapse: collapse" id="table1" bordercolordark="#C0C0C0" bordercolorlight="#C0C0C0" width="100%"> <tr> <th align="center" bgcolor="#C0C0C0" width="133"> <font face="Verdana" size="2">Error Code</font></th> <th align="center" bgcolor="#C0C0C0" width="812"><b> <font face="Verdana" size="2">Comment</font></b></th> </tr> <tr> <td width="133"> <p style="margin-top: 1; margin-bottom: 1"><font face="Verdana" size="1"> 1001</font></td> <td width="812"> <p style="margin-top: 1; margin-bottom: 1"><font face="Verdana" size="1"> server does not exist.</font></td> </tr> <tr> <td width="133"> <p style="margin-top: 1; margin-bottom: 1"><font face="Verdana" size="1"> 1002</font></td> <td width="812"> <p style="margin-top: 1; margin-bottom: 1"><font face="Verdana" size="1"> the connection request is rejected by the server.</font></td> </tr> <tr> <td width="133"> <p style="margin-top: 1; margin-bottom: 1"><font face="Verdana" size="1">1004</font></td> <td width="812"> <p style="margin-top: 1; margin-bottom: 1"><font face="Verdana" size="1">connection request was aborted due to security reasons.</font></td> </tr> <tr> <td width="133"> <p style="margin-top: 1; margin-bottom: 1"><font face="Verdana" size="1"> 5002</font></td> <td width="812"> <p style="margin-top: 1; margin-bottom: 1"><font face="Verdana" size="1"> the socket is not allowed to do a connect call: it is either in listening state or has been already connected.</font></td> </tr> <tr> <td width="133"> <p style="margin-top: 1; margin-bottom: 1"><font face="Verdana" size="1"> 5004</font></td> <td width="812"> <p style="margin-top: 1; margin-bottom: 1"><font face="Verdana" size="1"> <i>u</i> is an invalid UDT socket.</font></td> </tr> <tr> <td width="133"> <p style="margin-top: 1; margin-bottom: 1"><font face="Verdana" size="1"> 5008</font></td> <td width="812"> <p style="margin-top: 1; margin-bottom: 1"><font face="Verdana" size="1">The rendezvous set up processing is enabled; bind should be called before connect.</font></td> </tr> </table><H4><font face="Verdana" size="2">Description</font></H4><P><font face="Verdana" size="2">The <A><b>connect</b></A> method tries to connect to the UDT server at <i>name</i>. Since UDT is connection-oriented, the connection set up process will need at least 1 round trip time to finish.</font></P><P><font face="Verdana" size="2">The blocking manner does not affect the <b>connect</b> call. The <b>connect</b> process is always blocked until the connection is set up or rejected.</font></P><p></p><H4><font face="Verdana" size="2">See Also</font></H4><P><b><font face="Verdana" size="2"><a href="bind.htm">bind</a></font></b><font face="Verdana" size="2"><b>,<a href="listen.htm">listen</a></b></font></P></body></html>⌨️ 快捷键说明
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